#include <cstddef>
#include <cstdint>
#include <optional>
#include <string>
#include <string_view>
#include <vector>

Include dependency graph for TextTransform.h:

Classes
struct	donner::svg::text_transform::FullWidthText
	Transformed shaping text with the original byte offset of each Unicode codepoint. More...

Namespaces
namespace	donner
	Top-level Donner namespace, which is split into different sub-namespaces such as donner::svg and donner::css.
namespace	donner::svg
	Donner SVG library, which can load, manipulate and render SVG files.

Functions
char32_t	donner::svg::text_transform::FullWidthCodepoint (char32_t codepoint, bool preserveSpaces)
	Return the Unicode full-width mapping, retaining a collapsed ASCII space unchanged.
bool	donner::svg::text_transform::NeedsFullWidth (std::string_view text, bool preserveSpaces)
	Whether `text` contains a character whose full-width form differs.
std::optional< FullWidthText >	donner::svg::text_transform::MakeFullWidth (std::string_view text, bool preserveSpaces, size_t maximumBytes=kMaximumFullWidthBytes)
	Transform one source span, preserving codepoint count and original byte indices.

Variables
constexpr size_t	donner::svg::text_transform::kMaximumFullWidthBytes = 64u * 1024u * 1024u
	Maximum transient UTF-8 and source-index payload retained for one transformed span.

Function Documentation

◆ FullWidthCodepoint()

char32_t donner::svg::text_transform::FullWidthCodepoint	(	char32_t	codepoint,
		bool	preserveSpaces )

Return the Unicode full-width mapping, retaining a collapsed ASCII space unchanged.

Parameters

codepoint	Original Unicode codepoint.
preserveSpaces	Whether a U+0020 space was preserved by whitespace normalization.

std::optional< FullWidthText > donner::svg::text_transform::MakeFullWidth	(	std::string_view	text,
		bool	preserveSpaces,
		size_t	maximumBytes = kMaximumFullWidthBytes )

Transform one source span, preserving codepoint count and original byte indices.

Parameters

text	Original normalized text, which remains unchanged.
preserveSpaces	Whether U+0020 survived whitespace normalization as preserved space.
maximumBytes	Maximum combined UTF-8 and source-index payload, checked before allocation.

Returns: No result when the payload exceeds the bound or 32-bit shaping cluster indices.

bool donner::svg::text_transform::NeedsFullWidth	(	std::string_view	text,
		bool	preserveSpaces )

Whether text contains a character whose full-width form differs.

Parameters

text	Original normalized UTF-8 text.
preserveSpaces	Whether U+0020 spaces were preserved by whitespace normalization.